Work-feeding mechanism for drill presses or the like



Oct. 14. 1924.

J. H. M EVOY WORK FEEDING MECHANISM FOR DRILL PRESSES OR THE LIKE FiledFeb. 12. 1923 2 Sheets-Sheet l L I my: m

Oct. 14. 1924.

J. H. M EVOY WORK FEEDING MECHANISM FOR DRILL PRESSES OR THE LIKE} FiledFeb. 12, 1923 2 Sheets-$61902 2 Patented Oct. 14, 1924.

PATENT OFFICE.

JOSEPH H. McEVOY, or HOUSTON, TEXAS.

WORK-FEEDING MECHANISM FOR DRILL PRESSES OR THE LIKE.

Application filed February 12, 1923, Serial No. 618,642.

To all whom it may concern 7 Be it known that l, JOSEPH H. MoEvoY, acitizen of the United States, residing at Houston, in the county ofHarris and State of Texas, have invented certain new and useful.Improvements in Work-Feeding Mechanism for Drill Presses or the like, ofwhich the following is a specification, reference being had therein tothe accompanying drawing.

This invention relates to certain new and useful improvements in workfeeding mechanism for. drill presses or the like, the object being toprovide novel means for supporting and moving a pipe section or otherobject upon which it is desired to perform work of this character overthe bed of a drill press to allow the pipe section or object to beoperated on to form a. plurality of openings spaced equal distancesapart and is especially adapted to be used for perforating the pipesections for forming well strainers.

Prior to my invention in perforating pipes in forming well. strainers,the perforations were formed more or less irregularly in the pipe as noexact means had beenprovidedfor feeding the pipe in respect to the drillof the press, which caused the perforations to be so placed that theymore or less" weakened the pipe section and it was very difficult toform as great a number of openings in the pipe section as is capablewith my apparatus and as the advantage of a well strainer is to providea strainer sec tion with as many openings as possible evenly spacedapart without weakening the pipe, I have provided means foraccomplishing thisresul't in a novel manner.

Another object of my invention is to provide a feed mechanism which isexceedingly simple and cheap in construction in which the feed screw ornuts are so formed that they are interchangeable so as to cause the pipeto move longitudinally in respect to the drill different distances perrevolution or rotation of pipe in order to space the openings asdesired. H

A still further object of the invention is to provide a novel form ofkey member in which the feed nut travels for causing the pipe section tomove longitudinally in respect' to the drill press whereby the cost ofmanufacturing the same is greatly reduced and I am able to have the pipetravel longitudinally in respect to the press a predetermined distanceon each revolution or part thereof so as tor position the openingsformed by the drill of the press equal distances apart.

While I have shown and described an apparatus especially adapted rateused for perforating pipe sections for forming strainers, it is, ofcourse, understood that my invention is capable of perforating pipes andcylinders of all kinds or formin perforations in various otherobjectsand therefore I do not wish to limit myself to the particular useof this invention.

Other and further objects and advantages of the invention will behereinafter set forth and the novel features thereof defined by theappended claims.

In the drawings,

Figure l a" front levation of an apparatus constructed in accordancewith my invention; 7

Figure 2 is a perspective view of a portion of av strainer pipe section,coupling, bushing, feed screw and key member showing the relativeposition of the parts in position to be assembled; v

Figure 3 is alongitudinal section through the same, the key memberfleeing shown in dotted lines; v,

a Figure dis a longitudinal sectionshowing the key member within thefeed screw; and

Figure 5 is a detail view of a modified form of key member. I

In the drawing l indicates an overhead track as now generally in use .onwhich are mounted carriages 2 and 3 provided with chain blocks 4 and 5of the ordinary constructionnow. in use for supporting thework to beoperatedon, which is herein shown as a pipe section 6 in position on asupporting bedof a; drill press 7 which ishereln shown provided withrollers 8 for supporting the pipe under the drill 9. k E H The pipesection 6 is preferably provided with threaded ends and screwed on oneof the threaded ends is a coupling member 10 in which is secured anexternally and internally threaded reducingbushing member 1.1 in whichis adapted to be screwed or otherwise fastened one of the threaded endsof a feed nut12 herein shown formed of a tubular member havingexternally threaded ends and in which is secured a spiral 13. The spiralis secured within the tubular retainer for the spiral, the two partsbeing secured together by suitable means formingthe feed nut and Ipreferably secure the spiral in position by welding or by making thefeed nut of one solid piece with internal threads, it, of course, beingunderstood that the particular manner of connecting the feed nut andpipe to be perforated can be changed as the connection between these twomembers can be made in any desired manner as well as by threading.

While I have shown the spiral and the tubular member formed separate, itis, of course, understood that they could be formed integral but I havefound that the cost of manufacturing the same is greatly reduced byforming them separately and securing the same together after beingformed. "Secured in any convenient manner, preferably in a socket formedin the floor and spaced from the drill press is a standard 14 on whichis adjustably mounted a T coupling 15' in which is loosely secured bypin 15 one end ofa key pipe 16 which is provided with spaced projections17 herein shown in the form of screws secured within the pipe section,said key pipe being adapted to receive the feed nut and on which thefeed nut travels so as to cause the pipe section 6 to movelongitudinally in respect to the bit of the drill when the pipe isrotated and by having feed screws with spiralsof different pitches, thepipe section can be caused to travel different distances as it isrotated. This enables me to use feed nuts with various pitches, eachoperating on a single key pipe, the nuts being so formed that theytravel a unit distanice between each stud in a predetermined number ofturns of the pipe and feed nut. I I

In Figure 5 Ihave shown the projection 17 with a key member 16' arrangedon the upper and lower surfaces of the key member so as to cause thepipe section 6 to move longitudinally a predetermined distance upon eachrevolution of the same.

In the drawings I have shown an ordinary form of drill press and chainblock, overhead track and carriages for supporting the pipe sections tobe formed into strainers and as this pipe section is generally formedfrom 10 to 20 feet in length, I have found that by supporting the sameupon chain blocks of the ordinary construction now in use it can beyieldably supported so as to allow the pipe section to be properlypositioned on the bed of the drill press in order to allow the drill toform an opening in the pipe section.

WVhile I have not shown these members in detail, it is, of course,understood that they are allof the well known forms ofdrill presses,blocks, tracks and carriages now in use and therefore I do not wish tolimit myself to the use of any particular construction of means of thischaracter for supporting a pipe section to be perforated or tapped, as Iam aware that various changesin the supporting means can be made withoutdepart ing from the spirit of my invention.

In the operation of the feeding mechani'sm as herein shown and used inconnection with drill presses and supporting means as illustrated, thepipe which is to be operated on is placed within the chain blocks andallowed to rest on the rollers of the bed of the press. The reducingbushing is then placed in position within the coupling member which haspreviously been screwed into position upon one end of the pipe" section.A feed nut having the desired pitch is then screwed into position withinthe reducing bushing and the key pipe is inserted within the feed screwand fastened to a rigid standard at the other end. A hole is then formedin the pipe section by the drill of the drill press and the operatorthen rotates the pipe section which causes the pipe section duringrotation around its longitudinal axis to move longitudinally in respectto the drill.

As the pitch of the feed nut determines the distance of movementlongitudinally, the operator soon becomes accurate in positioning theopenings formed in the pipe section so that the openings are spaced anequal distance apart along the longitudinal axis of the pipe and equalor very nearly equal distances apart around the pipe according to thecare taken by the operator.

By using a key member and am able to cause the pipe section to be adafeed nut I vanced in respect to thedrill of the press and while I amaware that the substitution of feed screws or long threaded screws ofdifferent pitches together with threaded nuts to travel thereon wouldaccomplish the same result, the cost of manufacturing long screws wouldbe great in comparison with the cost of manufacturing'key pipes andmembers as herein shown and it would be necessary to have a number oflong threaded screws of different pitches where with my construction, itis only necessary to have a number of short feed nuts for advancing thepipe a predetermined distance upon each revolution or part revolution ofthe pipe.

What I claim is 1. The combination with a drill press, of flexible meansfor supporting and positioning a pipe section in position to be operatedon by said press and means for causing said pipe section to movelongitudinally 1n respect to said press as said pipe section is rotateda2. The combination with a drill press, of means for supporting a pipesection in position to be operated on by said press, a feed 3. Thecombination with means foriforming openings in a tubular member, ofmeans for supporting a tubular member in position to be operated on bysaid opening forming means, a feed nut carried by said tubular memberand a key member having projections on which said feed nut travels.

l. The combination with a drill press, of flexible means for movablysupport-ing and positioning a pipe section in respect to the bed of thedrill press, and means for moving said pipe section longitudinally inrespect to said press as said pipe section is rotated.

5. The combination with a drill press, of means for supporting a pipesection on the bed of said press, a bushing carried by said pipesection, a feed nut secured within said bushing and a key member havingprojections on which said feed nut travels for causing said pipe sectionto move longitudinally in respect to said drill as said pipe section isrotated.

6. A Work feeding mechanism for drill presses comprising a key memberhaving projections, a feed nut traveling on said key member and meansfor connectlng said feed nut to the material being operated on foradvancing the said material in respect to said drill press as saidmaterial is rotated on the bed of said press.

7. A work feeding mechanism for drill punch or reamer presses comprisinga key member having a support at one end and provided with projections,a feed nut having an internal spiral working on said key member, saidfeed nut being provided with threaded ends and a nut to which said feedscrew is connected having a connection with the material to be operatedon.

8. The combination with a drilling machine, of flexible means forsupporting a pipe section slidably relative to said machine, a keymember, a nut member cooperating therewith, one of said members beingsecured to said pipe section, means to hold the other of said membersstationary Whereby the rotation of said pipe section will cause it tomove longitudinally in respect to said machine.

In testimony whereof I hereunto affix my signature.

JOSEPH H. MoEVOY.

